CN104307601A - Vertical mill model selecting test system and method - Google Patents
Vertical mill model selecting test system and method Download PDFInfo
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- CN104307601A CN104307601A CN201410531282.8A CN201410531282A CN104307601A CN 104307601 A CN104307601 A CN 104307601A CN 201410531282 A CN201410531282 A CN 201410531282A CN 104307601 A CN104307601 A CN 104307601A
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Abstract
The invention relates to the technical field of a building and a machine, in particular to a vertical mill model selecting test system and method. The vertical mill model selecting test system comprises a feeding device, a vertical mill main machine, a dust collector, a fan, an electric control system and an analysis instrument, wherein the lower part of a storage cabin of the feeding device is connected with a hopper lifting machine and a star feeding valve through a pipeline, the star feeding valve is connected with the vertical mill main machine through a pipeline, the upper part of the vertical mill main machine is connected with a left inlet position of the dust collector through a pipeline, the right upper part of the dust collector is provided with the fan, the dust collector comprises a bag-type dust collector, a dust collection discharging device and a dust collection reamer, and the analysis device comprises an analysis scale and a negative pressure screening machine. The vertical mill model selecting test system has advantages that the performance of the material is tested, such milling characteristics of the material as grindability and abradability can be accurately analyzed, the electric consumption, the product fineness and the abrasion amount are comprehensively analyzed, the guarantee value of the unit electric consumption of the industrial mill can be determined, the abradability of a specific material can be effectively calculated, and the specification model selection and structure design accuracy of the industrial vertical mill can be greatly improved.
Description
[technical field]
The present invention relates to building and field of mechanical technique, specifically a kind of Vertical Mill type Selection Test system and method.
[background technology]
As you know, cement industry is the typical energy and Resource Dependence type industry, and along with the development of national economy, the energy-conserving and environment-protective task of China's cement industry is increasingly severe, and energy-saving and emission-reduction have become the current important topic of China's cement industry.
Industrial vertical mill is the preferred equipment of grinding system in manufacture of cement, and have and take up an area less, the features such as energy-conserving and environment-protective, are widely used in cement producing line.In order to ensure that the grinding performance of Vertical Mill in grinding system and output reach design objective, usually material is wanted to carry out the performance test of grindability and abrasion etc.The physical property test of material, generally carry out in the test vertical mill system of miniaturization, the grindability of the various material of main mensuration and to physical parameters such as the abrasions of high-abrasive material, the Vertical Mill grindability index of raw material is the important evidence determined Vertical Mill specification, carry out system configuration and design, abrasion index judges the adaptation situation of Vertical Mill to concrete raw material, in order to judge the maintenance period of wear-out part, be that choosing etc. of the specification type selecting of industrial vertical mill, structural design and high-abrasive material provides basic data support and technical guarantee.
[summary of the invention]
The object of this invention is to provide a kind of pilot system to large-scale Vertical Mill design selection, by measuring the energy consumption that different material produces in experimental rig, determine the characteristic of material, comprise grindability and abrasion, finally determine the Vertical Mill type Selection Test system and method for the model specification of industrial vertical mill.
For achieving the above object, design a kind of Vertical Mill type Selection Test system, comprise drawing-in device 1, Vertical Mill main frame 2, dust-precipitator 3, blower fan 4, electric-control system and analytical instrument, the bottom of drawing-in device Storage Silo 5 connects bucket elevator 6 and star-like feeding valve 7 by pipeline, described star-like feeding valve 7 connects Vertical Mill main frame 2 by pipeline, described Vertical Mill main frame 2 top connects dust-precipitator 8 left hand inlet port position by pipeline, described dust-precipitator 3 right upper portion is provided with blower fan 4, described dust-precipitator comprises bag filter 8, gather dust blanking device 9 and the reamer 10 that gathers dust, described analytical equipment comprises assay balance and negative pressure screening machine.
The rear of dust-precipitator arranges blower fan, ensures that whole pilot system is in negative pressure state, does not outwards spill dust, not to environmental effects.
A kind of Vertical Mill type Selection Test system and method, the method comprises the following steps:
A. preparation before on-test: pull down the grinding roller in test Vertical Mill, then remove four roller tires on it, weigh weight with balance after clean, and record data m
1, m
2, m
3, m
4, check grinding machine, reinstall roller tire, reinstall grinding roller, by Vertical Mill assembling reduction; Initial setting, grinding machine air quantity 480m
3/ h, hydraulic coupling 50bar; Fineness regulation: when powder concentrator=650 rev/min, product fineness is 12%R90 μm, often regulates 50 revs/min, and product fineness regulates 1%, adjustment powder concentrator rotating speed; And calculate and regulate feeding capacity, P=(2.5kW)/Bond work index;
B. firing test Vertical Mill device: record time on-test t
1, start bucket elevator successively by electric-control system, blower fan, gather dust blanking device, gather dust reamer, Vertical Mill, star-like feeding valve, feeding reamer, qualified product is gathered into dust through bag collector, then by gather dust reamer and the blanking device discharge of gathering dust under dust-precipitator, collects and obtain product;
A. measure product fineness: will collect the product that obtains every 5min time sampling, record all setup parameters on now Automatically controlled control cabinet, these parameters comprise simultaneously: the vibration of mill feeding amount M, thickness of feed layer H, grinding machine, come in and go out mill hot blast temperature (T
1, T
2), inlet outlet pressure differential (P in grinding machine
1, P
2), powder concentrator frequency (f);
B. fineness deviation: regulate powder concentrator frequency, and then regulate powder concentrator rotating speed, powder concentrator rotating speed is larger, fineness is higher, also adjustable systems air quantity, fineness is higher, reduces air quantity, fineness is lower, increase air quantity, mill power deviation, regulate feeding capacity and grinding pressure, grinding machine thickness of feed layer, regulates feeding capacity and grinding pressure;
C. off-test: time t after record off-test
2with power consumption w
2, emptying grinding machine, product gross weight m after grinding of weighing
7, dismounting grinding machine and grinding roller roller tire, weigh weight with balance after clean, and record data m
8, m
9, m
10, m
11, check grinding machine, reinstall roller tire, reinstall grinding roller, by Vertical Mill assembling reduction;
D. the calculating of screen over-size: R=m
6/ 25 × 100%;
E. yield in unit time: m
12=m
7/ t
3× 60, test period is the end time deduct the time started: t
3=t
2-t
1;
F. unit power consumption gauge is calculated: p=w
3/ t
3× 60/m
12× 1000, the electricity in ammeter before and after test is subtracted each other and obtains test power consumption, w
3=w
2-w
1;
G. damage gauge to calculate: the weight difference of four grinding rollers before and after grinding test is subtracted each other, obtains the wear extent of each grinding roller in grinding process, then add up to and draw total wear extent m
14, and calculate the wear rate A of this material, A=m
14/ m
7;
H. parameter conversion formula: fineness conversion factor is
, p
requirement=p
actual× f.
The present invention compared with the existing technology, its advantage is: start drawing-in device by electric-control system, Vertical Mill, dust-precipitator, blower fan, finished product sample is got after fixed interval, instrument determination finish fineness by analysis, in process of the test, running status repeatedly can be regulated to balance, test and rear performance test has been carried out to material, the grinding characters of accurate analysis material, comprise grindability and abrasion, to power consumption, product fineness, the comprehensive analysis of wear extent, effectively can draw the unit power consumption amount of industrial vertical mill, calculate the specifications and models of corresponding industrial mill, determine the guarantee value of industrial mill unit power consumption amount, also the abrasion of specific material can effectively be calculated, calculate industrial vertical mill from the time running to hardfacing reparation, specify its guarantee value, substantially increase industrial vertical mill specification type selecting and structural design accuracy.
[accompanying drawing explanation]
Fig. 1 is the schematic diagram of test vertical mill system flow process;
Fig. 2 is the structural representation front view of test vertical mill system;
Fig. 3 is the structural representation side view of test vertical mill system;
In figure: 1. star-like feeding valve 8. bag filter 9. of drawing-in device 2. Vertical Mill main frame 3. dust-precipitator 4. blower fan 5. Storage Silo 6. bucket elevator 7. blanking device 10. that gathers dust gathers dust reamer;
Specify Fig. 1 as Figure of abstract of the present invention.
[detailed description of the invention]
Below in conjunction with accompanying drawing, the invention will be further described, and the structure of this device and principle are very clearly concerning the people of this specialty.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
See Fig. 1, Fig. 2 and Fig. 3:
1. drawing-in device:
Drawing-in device comprises Storage Silo, feeding reamer, bucket elevator and star-like feeding valve, and Storage Silo is used for the material of grinding needed for storage test, and needed for single test, inventory is approximately 500kg; Bucket elevator to be used for the material lifting needed for test to Storage Silo and will throw away that grinding disc of vertical mill is outer and the coarse granule material that can not be blown afloat by hot blast is promoted to Storage Silo again, forming external circulating system; Feeding reamer is positioned at below Storage Silo, for controlling feeding capacity; Star-like feeding valve is positioned at Vertical Mill import, for locking wind, ensures that Vertical Mill negative pressure is run.
2. Vertical Mill:
Vertical Mill is mainly divided into upper and lower two large regions: bottom is grinding region, and primarily of housing, transmission, mill, grinding roller and hydraulic oil unit composition, its middle shell comprises shell and base; The shaft coupling that transmission comprises reducing motor and is connected with mill, rotates for being with movable grinding disc; Mill has 20 ° of inclination angles, and material is rolled grinding above mill, and is thrown out of mill due to the effect of centrifugal force; Grinding roller quantity is four, is distributed on above mill; Hydraulic oil unit is positioned at Vertical Mill side, and be mainly used in pressurization, provide the pressure that grinding roller grinds downwards, top is territory, powder-separating area, primarily of powder concentrator, rotor, guide vane and powder concentrator reducing motor; Regulated the rotating speed of rotor of powder separator by powder concentrator deceleration variable-frequency motor, thus regulate product fineness.
3. dust-precipitator:
Dust-precipitator comprises bag filter, gather dust blanking device and the reamer that gathers dust, and bag filter and roller mill separator discharging opening are coupled together by pipeline, and for collecting fine powder, the revolution reamer of below controls blanking velocity.
4. blower fan:
Blower and pipeline is connected with dust-precipitator, ensures that system negative pressure is run, guarantees whole system cleanliness without any pollution in running.
5. electric-control system
Comprised by the operational factor in the components and parts register system equipment such as sensor, Pressure gauge, flowmeter: inlet outlet pressure differential, powder concentrator rotating speed etc. in the vibration of mill feeding amount, thickness of feed layer, grinding machine, come in and go out mill hot blast temperature, grinding machine; Gone out by above-mentioned data digital display by electrical control cubicles, after record data, the fineness parameter according to analytical instrument regulates feeding capacity etc.
6. analytical instrument:
Analytical instrument mainly includes assay balance, baking oven and negative pressure screening machine.Be mainly used in measuring product fineness and moisture.
Concrete use step of the present invention is:
A. preparation before on-test
Pull down the grinding roller in test Vertical Mill, then remove four roller tires on it, weigh weight with balance after clean, and record data m
1, m
2, m
3, m
4, check grinding machine, reinstall roller tire, reinstall grinding roller, by Vertical Mill assembling reduction.To the raw material of laboratory be sampled to, and first through jaw crushing crusher machine, control out disintegrating machine raw meal particle size and be less than 8mm.If material moisture is more than 1%, hot-blast stove can be added and dry in process of the test, if not heating in process of the test, so need to dry in advance and ensure that feeding moisture is within 1%.Material after fragmentation is transported in Storage Silo, and records raw material weight m5, initial power consumption w
1(controlling raw material weight at about 500kg).
Initial setting, grinding machine air quantity 480m
3/ h, hydraulic coupling 50bar; Fineness regulation: when powder concentrator=650 rev/min, product fineness is 12%R90 μm, often regulates 50 revs/min, and product fineness regulates 1%, according to actual product fineness requirement, adjustment powder concentrator rotating speed; And calculate and regulate feeding capacity, P=(2.5kW)/Bond work index (if do not carry out the test of Bond's merit, sampling 200kg/h).
B. firing test Vertical Mill device
Record time on-test t
1start bucket elevator successively by electric-control system, blower fan, gather dust blanking device, gather dust reamer, Vertical Mill, star-like feeding valve, feeding reamer, the material then after fragmentation transports in feeding Storage Silo, adjustable star-like feeding valve under feed bin and feeding reamer enter in mill and roll grinding, mill is driven by below reductor and rotates, and the grinding material on mill throws away mill edge due to the effect of centrifugal force, and is taken in the powder concentrator above grinding roller by the hot blast that nozzle ring sprays.Fine powder is screened in powder concentrator, and a part of meal is fallen into mill central authorities and ground further, and another part meal enters Storage Silo circulation grinding through bucket elevator outer circulation, and product fineness is by rotor blade rotational speed regulation.The dust that qualified product is collected through bag collector is discharged with the blanking device that gathers dust by the reamer that gathers dust under dust-precipitator, collects and obtains product.
C. product fineness is measured
To collect the product that obtains every 5min time sampling, record all setup parameters on now Automatically controlled control cabinet, these parameters comprise simultaneously: the vibration of mill feeding amount M, thickness of feed layer H, grinding machine, come in and go out mill hot blast temperature (T
1, T
2), inlet outlet pressure differential (P in grinding machine
1, P
2), powder concentrator frequency (f) etc.25g is weighed by sampling the product assay balance obtained; Pour into the required fineness of test negative pressure sieve (being generally 90 μm), negative pressure sieve is put into negative pressure pulp classifier, covers glass cover, open negative pressure pulp classifier, run after 2 minutes, take out and weigh oversize, record data m6, and calculate the percentage R of screen over-size.
D. running status is regulated
Fineness deviation: experimentally require fineness, if fineness is higher, then regulate powder concentrator frequency, and then regulate powder concentrator rotating speed, powder concentrator rotating speed is larger, and fineness is higher; Also adjustable systems air quantity, fineness is higher, reduces air quantity; Fineness is lower, increases air quantity;
Mill power deviation: regulate feeding capacity and grinding pressure;
Grinding machine thickness of feed layer: regulate feeding capacity and grinding pressure.
E. off-test
Maintain the situation that product fineness is certain, after having ground all materials in Storage Silo, time t after record off-test
2with power consumption w
2, emptying grinding machine, product gross weight m after grinding of weighing
7, dismounting grinding machine and grinding roller roller tire, weigh weight with balance after clean, and record data m
8, m
9, m
10, m
11, check grinding machine, reinstall roller tire, reinstall grinding roller, by Vertical Mill assembling reduction.
F. data calculate
The calculating of screen over-size: R=m
6/ 25 × 100%;
Yield in unit time: m
12=m
7/ t
3× 60, test period is the end time deduct the time started: t
3=t
2-t
1
Unit power consumption gauge is calculated:
p=w
3/ t
3* 60/m
12× 1000, the electricity in ammeter before and after test is subtracted each other and obtains test power consumption, w
3=w
2-w
1;
G. wear extent calculates
The weight difference of four grinding rollers before and after grinding test is subtracted each other, obtains the wear extent of each grinding roller in grinding process, then add up to and draw total wear extent m
14, and calculate the wear rate A of this material; A=m
14/ m
7, m
14=(m
8-m
1)+(m
9-m
2)+(m
10-m
3)+(m
11-m
4);
H. parameter conversion formula
Fineness the possibility of result is measured in test and industrial vertical mill specifies fineness not to be inconsistent, and need to change its data, be converted to the unit power consumption amount under industrial vertical mill fineness requirement, concrete conversion formula is as follows:
Fineness conversion factor:
P
requirement=p
actual× f.
Claims (3)
1. a Vertical Mill type Selection Test system, comprise drawing-in device (1), Vertical Mill main frame (2), dust-precipitator (3), blower fan (4), electric-control system and analytical instrument, it is characterized in that the bottom of drawing-in device Storage Silo (5) connects bucket elevator (6) and star-like feeding valve (7) by pipeline, described star-like feeding valve (7) connects Vertical Mill main frame (2) by pipeline, described Vertical Mill main frame (2) top connects dust-precipitator (8) left hand inlet port position by pipeline, described dust-precipitator (3) right upper portion is provided with blower fan (4), described dust-precipitator comprises bag filter (8), gather dust blanking device (9) and the reamer that gathers dust (10), described analytical equipment comprises assay balance and negative pressure screening machine.
2. a kind of Vertical Mill type Selection Test system as claimed in claim 1, is characterized in that dust-precipitator rear is provided with blower fan, ensures that the operation of whole Vertical Mill is in negative pressure state, does not outwards spill dust.
3. a method for Vertical Mill type Selection Test system, is characterized in that the method comprises the following steps:
A. preparation before on-test: pull down the grinding roller in test Vertical Mill, then remove four roller tires on it, weigh weight with balance after clean, and record data m
1, m
2, m
3, m
4, check grinding machine, reinstall roller tire, reinstall grinding roller, by Vertical Mill assembling reduction; Initial setting, grinding machine air quantity 480m
3/ h, hydraulic coupling 50bar; Fineness regulation: when powder concentrator=650 rev/min, product fineness is 12%R90 μm, often regulates 50 revs/min, and product fineness regulates 1%, adjustment powder concentrator rotating speed; And calculate and regulate feeding capacity P=(2.5kW)/Bond work index);
B. firing test Vertical Mill device: record time on-test t
1, start bucket elevator successively by electric-control system, blower fan, gather dust blanking device, gather dust reamer, Vertical Mill, star-like feeding valve, feeding reamer, qualified product is gathered into dust through bag collector, then by gather dust reamer and the blanking device discharge of gathering dust under dust-precipitator, collects and obtain product;
C. measure product fineness: will collect the product that obtains every 5min time sampling, record all setup parameters on now Automatically controlled control cabinet, these parameters comprise simultaneously: the vibration of mill feeding amount M, thickness of feed layer H, grinding machine, come in and go out mill hot blast temperature (T
1, T
2), inlet outlet pressure differential (P in grinding machine
1, P
2), powder concentrator frequency (f);
D. fineness deviation: regulate powder concentrator frequency, and then regulate powder concentrator rotating speed, powder concentrator rotating speed is larger, and fineness is higher, also adjustable systems air quantity, and fineness is higher, and reduce air quantity, fineness is lower, increases air quantity; Mill power deviation, regulates feeding capacity and grinding pressure; Grinding machine thickness of feed layer, regulates feeding capacity and grinding pressure;
E. off-test: time t after record off-test
2with power consumption w
2, emptying grinding machine, product gross weight m after grinding of weighing
7, dismounting grinding machine and grinding roller roller tire, weigh weight with balance after clean, and record data m
8, m
9, m
10, m
11, check grinding machine, reinstall roller tire, reinstall grinding roller, by Vertical Mill assembling reduction;
F. the calculating of screen over-size: R=m
6/ 25 × 100%;
G. yield in unit time: m
12=m
7/ t
3× 60, test period is the end time deduct the time started: t
3=t
2-t
1;
H. unit power consumption gauge is calculated: p=w
3/ t
3× 60/m
12× 1000, the electricity in ammeter before and after test is subtracted each other and obtains test power consumption, w
3=w
2-w
1;
I. damage gauge to calculate: the weight difference of four grinding rollers before and after grinding test is subtracted each other, obtains the wear extent of each grinding roller in grinding process, then add up to and draw total wear extent m
14, and calculate the wear rate A of this material, A=m
14/ m
7;
J. parameter conversion formula: fineness conversion factor is
p
requirement=p
actual× f.
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|---|---|---|---|
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|---|---|---|---|
| CN201410531282.8A CN104307601B (en) | 2014-10-10 | 2014-10-10 | Vertical mill model selecting test system and method |
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| CN104307601B CN104307601B (en) | 2017-05-17 |
Family
ID=52362992
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|---|---|---|---|---|
| CN106040367A (en) * | 2016-08-03 | 2016-10-26 | 无锡得戟重工有限公司 | Grinding device for cement production |
| CN106644639A (en) * | 2016-12-22 | 2017-05-10 | 长沙矿冶研究院有限责任公司 | Model selection method for industrial type vertical stirring mill and model selection test closed-circuit fine milling system |
| CN107884300A (en) * | 2017-11-10 | 2018-04-06 | 农业部南京农业机械化研究所 | A kind of cereal percentage of damage, percentage of impurity detection means and detection method |
| CN108906306A (en) * | 2018-07-02 | 2018-11-30 | 山东世联环保科技开发有限公司 | Cement slurry Vertical Mill variation-tracking control method |
| CN110008643A (en) * | 2019-04-29 | 2019-07-12 | 中国建筑材料科学研究总院有限公司 | The evaluation method and the prediction technique of material grinding time and grinding material fineness of material grindability |
| CN111855249A (en) * | 2020-07-29 | 2020-10-30 | 四川皇龙智能破碎技术股份有限公司 | Powder preparation system test method |
| CN115739275A (en) * | 2022-11-01 | 2023-03-07 | 河北苹乐面粉机械集团有限公司 | Automatic flour mill |
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| CN106040367A (en) * | 2016-08-03 | 2016-10-26 | 无锡得戟重工有限公司 | Grinding device for cement production |
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| CN106644639B (en) * | 2016-12-22 | 2019-04-05 | 长沙矿冶研究院有限责任公司 | The closed circuit fine grinding system of the selection method and type Selection Test of industrial vertical stirring mill |
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| CN111855249A (en) * | 2020-07-29 | 2020-10-30 | 四川皇龙智能破碎技术股份有限公司 | Powder preparation system test method |
| CN111855249B (en) * | 2020-07-29 | 2022-11-22 | 四川皇龙智能破碎技术股份有限公司 | Powder preparation system test method |
| CN115739275A (en) * | 2022-11-01 | 2023-03-07 | 河北苹乐面粉机械集团有限公司 | Automatic flour mill |
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